Technical Description of TANDBERG MCU with software version D3
D12925 Rev. 03
17
4.1.7 MCU
Capacity
The total capacity of the MCU is defined by the following three rules.
RULES:
I. Software version defines maximum number of sites:
8+8 -> Maximum 8 video sites and maximum 8 telephones
16+16 -> Maximum 16 video sites and maximum 16 telephones
II. Total system bandwidth of the MCU is 7680 kbps (IP and ISDN) regardless of
software version. The maximum bandwidth used for ISDN calls is depending on the
number and type of PRI's installed:
a) The maximum bandwidth for
ISDN E1
is 7680 kbps (120x64 kbps, if all 4
PRI's are installed).
b) The maximum bandwidth for
ISDN T1
is 5888 kbps (92x64 kbps, if all 4 PRI's
are installed).
III. In addition, each call has a
Call Weight
depending on bandwidth and encryption as
follows:
Video sites:
Bandwidth
64
128 192 256 320 384 512 768 1152 1472 1920
Non-encr.
37
40 41 42 44 46 54 62 80 88 110
Encrypted
53
59 60 61 68 73 84 111
N/A N/A N/A
Telephone sites:
Bandwidth Telephone
Non-encr.
11
Encrypted
N/A
The sum of the
Call Weights
cannot exceed
845
.
(Users will be prevented from setting up calls that exceeds this limit).
Example of call weight calculation:
If the MCU has made 6 calls at 768 kbps, 4 calls at 384 kbps, and 4 encrypted calls at 192 kbps
the calculation will be:
6x
62
+ 4x
46
+ 4x
60
= 796.
Since 796 is less than 845, this will be OK.
